ASTM D2863 Oxygen Index Oxygen Index: Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of PlasticsThe purpose of ASTM D2863 is to establish the lowest oxygen concentration in an oxygen/nitrogen combination necessary to sustain a flame burn on a plastic specimen. Real end use circumstances are not correlated. The test sample is placed vertically in a glass chimney, and a flow of oxygen and nitrogen is created there by starting at the bottom of the chimney. The test sample's top edge is lighted, and when the oxygen concentration in the flow falls, the flame eventually goes out. Specimen dimensions: Depending on the kind of material being tested, there are six requirements for the test specimen.
The material, size and quality of the products are consistent with the original packaging, and the price is more favorable. 1. Material selection TFM (or PFA), low blank value 2. No return material is added to the product to ensure purity 3. It is applicable to all manufacturers and models of microwave digestion instrument, without error 4. The same product quality, the price is one half to one third of the original factory 5. Various brands and models of microwave digestion tanks can be processed according to customer requirements
PFA digestion tube is mainly used for sample digestion before chemical analysis. The chemical stability of PFA material can significantly reduce cross contamination. Its friction coefficient is very low in plastics. It also has good electrical properties. Its electrical insulation is not affected by temperature. It is known as the king of plastics. characteristic: 1. The appearance is translucent, with 30ml and 60ml specifications: U-shaped bottom, V-shaped bottom and flat bottom; 2. High and low temperature resistance: service temperature - 200+260 3. Corrosion resistance: resistant to strong acid, alkali, aqua regia, hydrofluoric acid and various organic solvents; 4. Insulation resistance: the dielectric property is independent of temperature and frequency, and the radiation resistance is excellent; 5. Anti pollution: low blank value of metal elements; 6. With low dissolution and precipitation, it is a good container for storing reference materials, highly corrosive, expensive and ultra-high purity reagents; 7. Drop from a height of 1.2m above the ground, and the bottle body will not crack, the bottle cap will not fall off, and there will be no leakage
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